A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

Faceless white figures loom over the city from the rooftop.

A shining, cold, black organ lies in San Francisco's financial district.

This contorting sculpture is the tallest in San Francisco.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

A tall karst islet popularized by 007.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

This subtle Berkeley paving stone actually marks off a lawless tube of air that extends into space.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

The historic building's ornate stained glass fixture has survived the devastating 1906 earthquake, ensuing fires, and multiple redevelopment attempts.

A playing field for a popular French past time can be found tucked away in a quiet corner of Golden Gate Park.

27-room home built with the fortune of a sugar magnate.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

Fake rail crossings mark the site of an influential doctor's demise.